<!DOCTYPE html>
<html>
<head>
<style>
table {background-color:green}
col {background-color:red}
td { color: white }
</style>
<script>
function runTest()
{
  document.body.offsetHeight;
  document.getElementById("col").style.visibility = "collapse";
}
</script>
</head>
<body onload="runTest()">
<table>
  <col id="col" span="2">
  <tr>
   <td>One</td>
   <td>Two</td>
   <td>Three</td>
  </tr>
</table>
</html>
